blevney



llruTnn dTrtTns PATENT @rrrcn.

JOHN BLEVNEY, OF NE\VARK, YEW JERSEY.

WIQ CHINE FOR PULVERIZING ORES, 81,0.

SPECIFICATION forming part of Letters Patent No. 309,189, dated December16,1884.

.\pplicnlion filed January :26, 1854.

To all 1071/0712, it may canoe/12 Be it known that I, JOHN C. BLEVXEY, acitizen of the United States, and a resident of the city of Newark, inthe county of Essex and State of New Jersey, have invented certain newand useful Improvements in Machines for Pulverizing Ores, &c., of whichthe following is a specification.

The object of my invention is to provide a mill for grinding ores andother substances of such construction that the ores themselves willserve as grinding'surthces, while the reduction will be assisted byknives or breakers between which portions of the ores are forced.

In the drawings, Figure l is a side sectional view of a mill embodyingmy invention. Fig. 2 is a plan view with the cover of the mill removed.Figs. 3 and 4: are enlarged detail views showing the knives or breakersand adjacent parts, and Fig. 5is a detail perspective view of the meansfor adjusting one of the grinding-wheels relative to the other.

A. indicates the casing ofmy mill, which sup ports the shaft B, carryingthe driving-pulley O, and having a suspensory bearing inaverticallyadjustable sleeve, 1), as fully described in my applicationNo. 118,837, filed simultaneously herewith.

To the shaft 13 are fixed the grinding-wheels E and E, each of whichconsists of a disk, 0, having aserics of radial arms or ribs, 0, thepockets formed by the arms or ribs being open at the peripheries of thewheels.

To the outer end of each of the ribs 0 is fastened a breaker or knife,6-, preferably of hardened steel, the connection being made by a tongueand groove, as shown, the grooved knives being held upon the tongues onthe ribs by clamps c", fastened by set-screws e, the disks e beingslotted, so that the knives pass entirely through them vertically. Asthese knives are groovedin their centers they may be reversed when worn,to bring a new corner into working position.

The sections of the casin A opposite the wheels E and E are providedwith inwardlyprojecting annularfianges to, having ribs a, to which aresecured steel breakers or knives a similar to the knives or breakers a",and having tongue-and-groove connections with their ribs, so as to bereversible. The knives a are preferablyheld against their ribs byclamping (No model.)

blocks a, abutting against projections on the inside of the casing, andsaid knives are held in position by the screws a", passing looselythrough the casing and tapped into said blocks. The ribs a form openpockets, into which the material to be ground is forced, as will beexplained presently.

. As the stationary and rotary knives are inclined outward at their topsit is obvious that a vertical adjustment of the shaft B, to which thewheels E and E are fastened, will move the adjacent edges of said knivesnearer to or farther from each other, as circumstances may require; butfor convenience in assembling the machine, or to provide forcompensating for greater wear of the upper sets of knives, the wheel Eis made adjustable on the shaft inde pendently of the wheel E. Theadjustment of the wheel E is effected by means of a thread ed collar, F,secured to the hub of the wheel It by one or more pins, f. Aninternallythreaded gear-wheel, f, is fitted to the collar F, and meshingwith said gear-wheel is a pinion, y, carried by a small shaft, G,supported by a boss on one of the ribs 0. By turning the shaft G thegear-wheel f will be rotated,

thus raising or lowering the wheel E. The gear-wheel j" thus serves asan extension of the collar F, which may threfore properly be called anextensible collar. It will be understood that before adjusting the wheelE the screw collar or nut Z) on the shaft B will be loosened, and willbe tightened again after the adjustment has been made.

Instead of making the breakers or knives c and a removable andreversible, as above described, they may be inserted in the molds beforecasting the wheel or casing, and thus become integral with their ribs.By making the number of the knives on the wheels larger or smaller thanthe number of the stationary knives, or by arranging these knives atvarying distances apart, only one set of knives will come together atthe same time.

The operation of my machine is as follows: The material to be reducedcomes in at the inlet H and falls on the disk 6 of the wheel E. Therotation of the latter forces the material outward, filling thestationary pockets formed by the flanges a and ribs a. hen the latterpockets are filled, there will be a mass of stationary material, againstwhich the mass of moving material carried by the wheel E will beconstantly forced, and thus the moving and stationary masses will serveas grinding-surfaces for each other, while the larger pieces orparticles, being constantly caught between the rotary and stationaryknives, will be sharply broken, thus continually supplying sharpgrinding particles to assist in the reduction. The pulverized material,after passing the wheel E, is received by the wheel E and the grindingoperation is repeated, after which the mass falls into the receiving-panand finds exit at the outlet I. It will be understood that the disks 6and the adjacent flanges a serve as gages to determine the fineness ofthe passing reduced material.

I do not claim herein the method (incidental to the operation of themachine) above described for reducing and pulverizing ores and similarsubstances, as I reserve the right to claim the same in a futureapplication.

Having thus described my invention, I claim 1. In agrinding-mill, thecombination, with a casing provided with an in wardly-proj ecting flangeand ribs, forming a series of stationary pockets, of a revoluble wheelconsisting of a solid or imperforate disk and radial ribs, forming aseries of pockets, which are open at the periphery of said wheel towardsaid stationary pockets, substantially as set forth.

breakers or knives, said disk and ribs forming revoluble pockets,substantially as set forth.

3. In agrinding-mill, the combination, with the shaft thereof and agrinding-wheel, of an extensible collar, said wheel and collar beingboth connected with said shaft, and thereby adapted to rotate therewith,substantially as set forth.

4. The combination, with the shaft B and the attached grinding-Wheels Eand E, of the threaded collar F, placed between said wheels, andconnected with said shaft, and thus adapted to rotate therewith, thegear-wheel f, fitted to said collar, and the shaft G, carried by thewheel E, and provided with the pinion 9, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 24th day of January, 1884.

JOHN C. BLEVNEY.

\Vitnesses:

IVIARY H. BLEVNEY, GEORGE H. VrNcENT.

